COCOA BY-PRODUCTS 
29 
fertilizer industry. The material, like the related product, cacao 
shells, is used as a rough organic ammoniate conditioner and filler 
in complete fertilizer mixtures. 
Data on the quantities of cocoa cake extracted annually and the 
production of extracted sludge and dried extracted cocoa have been 
furnished by the producer, but these can not be published, as they 
relate to the operations of one concern only. 
The yield of wet, extracted cocoa per ton of press cake extracted 
will vary somewhat with the amount of fat in the original cocoa 
cake, but from 1 ton of cake containing 18 per cent of fat about 2 
tons of wet sludge containing 60 to 65 per cent of water would be 
produced. This would yield about 1,600 pounds of dried, extracted 
cocoa (with 8 per cent moisture), or 80 per cent of the weight of 
cocoa extracted. 
Nothing whatever concerning solvent-extracted cocoa, its composi- 
tion and properties, was found in the literature. 
Fig. 2. — Accumulated extracted-cocoa sludge. This is the residue from solvent- 
extraction of the fat from by-product cocoa. The material is being wheeled to the 
drier shed, where it is prepared for the fertilizer market 
Samples representing both the wet extracted cocoa and the dried 
material produced at the extraction plant have been examined and 
their nature is indicated by the analytical results given in Table 4. 
No attempt was made to have these samples represent the same 
batch of extracted cocoa, however. The data relating to the solubil- 
ity and quality of the nitrogen of these samples are included in 
Table 3. 
Sample 106 is the wet extracted sludge and its composition on both 
the wet and dry basis is shown. A portion of this sample was dried 
at 100° C. in the laboratory, and its composition corresponds to that 
of factory-made sludge dried without scorching or charring. Sample 
107 was dried in the direct-heat rotary kiln at the factory and was 
decidedly charred. For this reason another sample (No. 116) of 
the commercial dried product which had been much less charred in 
drying was procured. Sample No. 101 is defatted cocoa that had 
been prepared in an industrial experimental plant. 
